>> i will do better than this president has done for the american people! >> in colorado tonight, barack obama and mitt romney in their first presidential date. >> these debates are an opportunity for each of us to describe the pathway forward. >> what i'm most concerned about is having a serious discussion about what we need to do to keep the country growing. >> two men with different vision on issues voters care about most. both of them. >> we certainly can't go far with a leader who writes off half a nation. >> he said he can't change washington from the inside. he can only change it from outside. well, we're going to give him that chance in november. >> watch cnn's coverage, side by side on big problems. will this night change an election that's just a month away? >> i need your help on november 6th. >> you believe in me. i'm asking for your vote. >> the nation is watching, voters want answers and america's future is up for debate. >>> this is university of denver, where the presidential candidates could go a long way tonight toward winning or losing th